Run Time Environment Questions

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1.

Which of the following known as the text part of a program that does not change at runtime. Its memory requirements are known at the compile time?

A

Code

B

Procedures 

C

Variables 

D

All of the above

Correct Answer: A

Code : It is known as the text part of a program that does not change at runtime. Its memory requirements are known at the compile time.

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2.

A procedure has a start and an end delimiter and everything inside it is called the body of the procedure.

A

TRUE

B

FALSE

C

A procedure has a start with delimiter but not end with delimiter.

D

A procedure has a not start with delimiter but end with delimiter.

Correct Answer: A

A procedure has a start and an end delimiter and everything inside it is called the body of the procedure.

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3.

 In activation record, Which of the following Stores the address of activation record of the caller procedure?

A

Access Link

B

Actual Parameters

C

Control Link

D

Temporaries

Correct Answer: C

Control link : Stores the address of activation record of the caller procedure.

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4.

 Whenever a procedure is executed, its activation record is stored on the stack, also known as?

A

Access Stack

B

Control stack

C

Formal Stack

D

Return Stack

Correct Answer: B

Whenever a procedure is executed, its activation record is stored on the stack, also known as control stack

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5.

_________ are known at the runtime only, unless they are global or constant.

A

values

B

Object

C

Variables

D

All of the above

Correct Answer: C

Variables are known at the runtime only, unless they are global or constant. Heap memory allocation scheme is used for managing allocation and de-allocation of memory for variables in runtime.

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6.

The location of memory (address) where an expression is stored is known?

A

r-value

B

k-value

C

l-value

D

t-value

Correct Answer: C

The location of memory (address) where an expression is stored is known as the l-value of that expression.

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7.

What is true about Formal Parameters?

A

These variables are declared in the definition of the called function.

B

These variables are specified in the function call as arguments.

C

Variables whose values or addresses are being passed to the called procedure are called Formal Parameter.

D

All of the above

Correct Answer: A

Variables that take the information passed by the caller procedure are called formal parameters. These variables are declared in the definition of the called function.

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8.

In which mechanism, the calling procedure passes the r-value of actual parameters and the compiler puts that into the called procedure

A

Pass by Reference

B

Pass by Name

C

Pass by Copy-restore

D

Pass by Value

Correct Answer: D

Pass by Value : In pass by value mechanism, the calling procedure passes the r-value of actual parameters and the compiler puts that into the called procedure

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9.

In which mechanism, the name of the procedure being called is replaced by its actual body?

A

Pass by Reference

B

Pass by Name

C

Pass by Copy-restore

D

Pass by Object

Correct Answer: B

In pass by name mechanism, the name of the procedure being called is replaced by its actual body. Pass-by-name textually substitutes the argument expressions in a procedure call for the corresponding parameters in the body of the procedure so that it can now work on actual parameters, much like pass-by-reference.

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10.

What will be error?

A

7 = x + y;

B

r-value error

C

Infinite loop

D

Both A and B

Correct Answer: A

An l-value error, as the constant 7 does not represent any memory location.

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